add correct variable type code patcher

labs/2/Main.java

@@ -16,8 +16,7 @@ public class Main {
         boolean help_enqueued = false;
         boolean allow_networking = true;
         String matrix_file_name = "";
-        int verbosity = 1;
-        
+
         int p = 0;
         while (p < args.length) {
             try {
@@ -25,10 +24,6 @@ public class Main {
                     help_enqueued = true;
                     p += 1;
                 }
-                else if (Objects.equals(args[p], "-v")) {
-                    verbosity = Integer.parseInt(args[p+1]);
-                    p += 2;
-                }
                 else if (Objects.equals(args[p], "--offline")) {
                     allow_networking = false;
                     p += 2;
@@ -59,16 +54,34 @@ public class Main {
             if (allow_networking) {
                 System.err.println("[WARN] File is missing, downloading random matrix from the server");
                 fetchResource("http://lab2.kpi.dev:16554/matrix.py", matrix_file_name);
+            } else {
+                System.err.println("[WARN] File is missing; networking is disabled, not recovering");
+                System.exit(1);
             }
         }
 
+        // loading matrix data from file
+        int[][] raw_m = loadMatrixFromFile(matrix_file);
+
+        // creating original matrix object
+        System.out.println("Original matrix:");
+        Matrix m = new Matrix();
+        m.init(raw_m);
+        
+        // transposing
+        m.transpose();
+        System.out.println("\nTransposed matrix:");
+        m.print();
+
+        // avg
+        System.out.println("\nAverage value is " + m.getAvg());
     }
 
     private static void fetchResource(String remote_url, String output_filename) {
         try {
             BufferedInputStream in = new BufferedInputStream(new URL(remote_url).openStream());
             FileOutputStream fileOutputStream = new FileOutputStream(output_filename);
-    
+
             byte dataBuffer[] = new byte[1024];
             int bytesRead;
             while ((bytesRead = in.read(dataBuffer, 0, 1024)) != -1) {
@@ -97,7 +110,7 @@ public class Main {
             Scanner help_file_scanner = new Scanner(help_file);
 
             while (help_file_scanner.hasNextLine()) {
-                System.out.print(help_file_scanner.nextLine());
+                System.out.println(help_file_scanner.nextLine());
             }
     
             help_file_scanner.close(); 
@@ -106,4 +119,41 @@ public class Main {
             System.exit(1);
         }
     }
+
+    private static int[][] loadMatrixFromFile(File matrix_file) {
+        try {
+            Scanner matrix_file_reader = new Scanner(matrix_file);
+
+            ArrayList<String> raw_matrix_lines = new ArrayList<String>();
+            while (matrix_file_reader.hasNextLine()) {
+                raw_matrix_lines.add(matrix_file_reader.nextLine());
+            }
+    
+            ArrayList<String[]> baked_matrix_lines = new ArrayList<String[]>();
+    
+            for (String s : raw_matrix_lines) {
+                baked_matrix_lines.add(s.split(" "));
+            }
+            
+            int ref_length = baked_matrix_lines.get(0).length;
+            int[][] baked_matrix = new int[baked_matrix_lines.size()][ref_length];
+            
+            for (int i = 0; i < baked_matrix_lines.size(); i++) {
+                if (baked_matrix_lines.get(i).length != ref_length) {
+                    System.err.println("[ERROR] Matrix lines have different length! Assuming the matrix was corrupted");
+                    System.exit(2);
+                }
+
+                for (int j = 0; j < baked_matrix_lines.get(i).length; j++) {
+                    baked_matrix[i][j] = Integer.parseInt(baked_matrix_lines.get(i)[j]);
+                }
+            }
+
+            return baked_matrix;
+        } catch (Exception e) {
+            System.err.println("[ERROR] Failed to read matrix from file " + matrix_file.getName());
+            System.exit(1);
+            return new int[1][1];
+        }
+    }
 }

labs/2/Matrix.java

@@ -0,0 +1,63 @@
+public class Matrix {
+    private int[][] m;
+
+    public void init(int[][] base_m) {
+        this.m = base_m;
+    }
+
+    public int[][] getMatrix() {
+        return this.m;
+    }
+
+    public void print() {
+        for (int[] ml : this.m) {
+            for (int e : ml) {
+                System.out.printf("%4d ", e);
+            }
+            System.out.println();
+        }
+    }
+
+    public void transpose() {
+        print();
+        if (this.m[0].length != this.m.length) {
+            int new_h = this.m[0].length;
+            int new_w = this.m.length;
+
+            int[][] new_m = new int[new_h][new_w];
+
+            for (int i = 0; i < this.m.length; i++) {
+                for (int j = 0; j < this.m[i].length; j++) {
+                    new_m[j][i] = this.m[i][j];
+                }
+            }
+
+            this.m = new_m;
+        } else {
+            // if a matrix is square, there is no need to
+            // make a new one
+
+            int temp_value_holder;
+
+            for (int i = 0; i < this.m.length; i++) {
+                for (int j = 0; j < i; j++) {
+                    temp_value_holder = this.m[i][j];
+                    this.m[i][j] = this.m[j][i];
+                    this.m[j][i] = temp_value_holder;
+                }
+            }
+        }
+    }
+
+    public double getAvg() {
+        double total = 0;
+
+        for (int[] ml : this.m) {
+            for (int e : ml) {
+                total += e;
+            }
+        }
+
+        return total / (this.m.length * this.m[0].length);
+    }
+}

labs/2/src/help.txt

@@ -1 +1,4 @@
-Dummy help file
+Usage: java Main [options] [matrix_file]
+Options:
+    -h         Output this help text
+    --offline  Prevent any possible attempt to fetch missing files from the server

labs/2/transform-to-double.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+sed -i 's/int/double/g;s/prdouble/print/g;s/Integer.parseInt/Double.parseDouble/g;s/for (double i/for (int i/g;s/for (double j/for (int j/g;s/matrix.py/double-matrix.py/g;s/double p/int p/g;s/double bytesRead/int bytesRead/g;s/double ref_length/int ref_length/g;s/double new/int new/g;s/%4d/%4.3f/g' Matrix.java Main.java
+
+javac Main.java Matrix.java
+rm random_matrix.txt

labs/2/web/double-matrix.py

@@ -0,0 +1,2 @@
+import random
+print("Content-Type: text/plain\n\n" + "\n".join([" ".join(list(map(str, [round((random.random()-0.5)*200, 4) for i in range(7)]))) for i in range(7)]))